Weeds harmful to grain crops in the Krakow Region
1996
Labza, T. (Akademia Rolnicza, Krakow (Poland). Katedra Ogolnej Uprawy Roli i Roslin)
The weeds harmful to grain crops were allocated to 27 soil units, using 725 phytosociological records. The weeds considered harmful were those which, on a given soil, had the frequency of appearance not lower than 40% of analysed fields, and a coverage coefficient higher than 1. The list of harmful weeds comprises 36 species in the Krakow Region. Of this number, only 12 were found more frequently (6-22) in studied soils. The remaining weeds were harmful in 1 to 2 soil units, and were closely related to a given habitat. The number of species harmful to cereal crops was 2 to 15, in individual soil units
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